Cloud Native

OpenShift provides an Operators section in its web console UI for the installation and management of operators on the cluster. OperatorHub The OperatorHub is an interface for searching and installing operators. It has the following categories of operators: Red Hat Operators: Operators developed and supported by Red Hat. Example: Red Hat Quay Operator Certified Operators: Operators listed by Red Hat’s Independent Software Vendors (ISVs). Example: CockroachDB Operator Red Hat Marketplace Operators: Applications purchased from Red Hat Marketplace available as Operators....

Applications built to be deployed on Kubernetes could be packaged as Operators. Operators automate the process of installation, updates, and management of the application. These automations are defined by developers based on the application’s business logic. An Operator consists of: Custom Resources (CRs) required by the application Custom controller for managing these CRs Control Loop A control loop is an infinite loop for monitoring the state of a system....

There is an app for everything and modern app stores have made it extremely convenient to install them on your device. However, some underlying issues need to be discussed Each application has a different set of terms and services. A small subset of users read it and a smaller subset of them will refuse to use the application if they disagree with it. These applications are critical for your daily life but if you lose access to them, there might not be a proper support channel to regain access or retrieve data....

Public registries provide container images for most use cases but they might not cover all of them. That’s why container engines such as Podman & Docker and CLI tools like buildah provide utilities for creating custom container images. The build steps are written in a plaintext file called Containerfile and parsed by container engines (or buildah) during the build process. # ContainerfileFROMnode:18-alpineLABEL version="1.0" WORKDIR/appCOPY . .RUN yarn install --productionCMD ["node", "src/index....

A container image is a static file that contains the necessary resources (packages, configuration, other dependencies) required to provision a container. It consists of multiple layered-filesystems and a Manifest file, containing its metadata. Open Container Initiative (OCI) Specification Open Container Initiative was established by The Linux Foundation in 2015 to provide Runtime specification Image specification Distribution specification for container images. A container image created from OCI Image specification should have...